Wheel-dressing device



Jan. 20, 1925. 1,523,452

H. M. ROCKWELL WHEEL DRESSING DEVLCE Original Filed May 29, 1920 2 Shets5heet ll A TT/P/VEY Jan, 20, 1925.

H. M. ROCKWELL vWHEEL DRESSING DEVlCE original Filed may 29.

1920 2 Sheets-Sheet 2 MQW Patented dan. 2%, i925. i

uit eine.

HUGH IVI. ROCKWELL, OF BRISTOL, CQNNECTICUT, ASSIGNOR T MARLIN-ROCKWELL CORPORATION, NEW YORK, N. Y., A CORPORATION OF NEW YORK WHEEL-DRESSING DEVICE.

Application led May 29, 1920, Serial No. 385,223. Renewed .Tune 13, 1924.

To @ZZ whom it 12mg/ concern.' Fig. 5 is an enlarged detail elevation.

Be it known that I, HUGH M. RocKwnLL, partly in section, ot the device: 55

a citizen `of the United States, and a resident Fig. 6 is a. section on line 6;-6 of Fig. 5.

of Bristol, in the county of Hartford and 'The head 1 of a grinding machine has State of Connecticut, have invented certain journalled therein a spindle v4upon which is new and useful Improvements in l/Vheelmounted the grinding wheel 2. A projec- Dressing Devices, of which the following is tion 3 extends from the head at right angles G0 a Specification, Y to the axis of rotation of the spindle."l A

This invention relates to a device for borre l leads from the end of the projection ,l0 dressing the cutting surface of a grinding 3 through they base of the head 1 to a recess wheel, in the other side of the head. The pro- In the `grinding of the raceways or ball jection 3 isrcut away to form theslot 6 and 65 grooves for `antifriction bearings, it is genalso to form the aperture 7. Mounted in the .orally customary to shape the cuttingsurface bore l is the hollow interiorly-threaded` slide 15 of the grinding wheel to conform to the S, the arm 9 of which is seated in the slot6. curvature of the `ball groove to be ground The surface of the slide is grooved at and thereby. It is the object of this `invention arranged in the aperture 7 to lit in the 70 toprovide a device for dressing the cutting groove 10 is a key 11, which key is held in surface of a. grinding wheel to give to it the place by the plate 12 bolted tothe projection desired curvature. 3, in which plate is mounted the set screw A further object of this invention is the 13, having a shank 14 adapted to enter the provision of a device of this character which Socket 15 in the key. Interposed between also serves as a shield for the grinding the'key and the head of the set screw and wheel. l surrounding the shank 1% is the leather plug To accomplish this object, I provide a 16. Pressure is exerted on the key through 4feed member on the wheel-carrying head arthe plug 16 to exert friction on the slide 8 ranged for ymovement in a direction at right to prevent free reciprocatory movement angles to the axis of rotation of the wheel thereof. In the recess 5 is the plate 17 which spindle. l0n said feed member is fastened a is held in place by the bolts 18 passing bracket: having Curved arms between the through the curved slot-s 19 in the plate. ends of which is pivotally mounted acurved Extending through the plate is an aperture frame. A pin or the like carrying a diamond 20, concentric with which is the collar 21 on 95 in one end is adjustably supportedon the the outer face of the plate, which collar is frame and is arranged to traverse the cutting Cut away at 22, one end of the collar bein surface of the wheel when the frame is shaped to provide a cam surface 23 and the ,oscillated To use the. device the diamond other end presenting a radial shoulder 24. carrier is adjusted to so locate the diamond A feed screw 25 has its reduced end 26 Wl that, when the frame is oscilla-ted, it will journalled in the aperture 2O of the plate traverse a curved path of the desired radius 17 and the threaded portion thereot operato dress the cutting surface of the wheel to tively associated with the slide 8. `Within the proper curvature. By means ofthe feed the collar 21 and keyed to the portion 2G member the bracket may be moved to bring of the feed screw 25 is the ratchetwheel 2T. 95 the diamond into contact with the surface to The lever 28 is rotatably mounted on the be dressed, in which position of the device collar 21 and is provided with a ratchet 29 the wheel is partially enveloped, thereby which is arranged to pass through the cutthus providing a shield therefor. out 22 and engage the teeth of the ratchet `In the accompanying drawings wherein is wheel when the lever is in the position 100 disclosed an embodiment of the invention, shown in Fig. 8. A leather washer 30 is Fig. 1 is an elevation, partly in section, of interposed between the ratchet wheel and the device as applied to a grinding machine; the pla-te 1T and the steel washer 31 is held Fig. 2 is a plan view; against the ratchet wheel and lever 28 by Fig. 3 is a section on line 3-3 of Fig. 4; the nut 32. A stop 33 limits the throw of 105 Fig. 4 Aisa section on line 4 4 of Fig. 2; the lever 287.

A movement of the lever 28 in a clockwise diiection will cause a partial rotation of the feed screw, due to the engagement of the ratchet with a tooth of the ratchet wheel. The friction exerted by t-lie leather washer 3() prevents backward rotation of the ratchet wheel when the lever is returned to posit-ion, and the friction exerted by the key l1 on the slide S serves to prevent unintentional movement of the slide. T o return the slide to its original position when a new wheel is put on, the lever 28 is moved in a counterclockwise direction to the position shown in Figs. l, 2 and 4, the ratchet riding up the cam surface 23, thereby being disengaged from the ratchet wheel and allowing counter-clockwise rotation of the feed screw. The plate l? may be circumferentially adjusted to so place the cut-out portion 22 that a movement of thelever 28 will advance the ratchet wheel one, two, three, or more teeth, as desired.

A bracket 34, having the curved arms and `36 conforming generally to the periphery of the grinding wheel 2 and act-ing as a shield, is clamped to the arm 9 of the slide 8 and between said arms is rotatably mounted the frame 37. ln the lower arm 35 of the bracket is arranged a beai'ing 38 having a socket in its upper end, and the lower end of the frame carries a similar bearing 39, having a socket 40 in its lower face. A ball 41 is seated partly in one socket and partly in the other. 0n the upper end of the bearing 39 is another socket 42. The upper arm 36 of the bracket carries a bearing 43, having a bell-inounted aperture en tending therethrough in which is mounted the shank 44 of the bearing 45 caried by the frame 37. Between the head of the bearing 45 and the bell mouth of the bearing 43 are arranged antifriction balls 4G. 1n the lower face of the bearing 45 is a socket 47. Clamped to the upper portion of the shank 44 extending above the arm 36 of the bracket 34 is the operating lever 48. A pin 49 having at one end the diamond 50, is mounted in an aperture in the frame S7 and is held in any desired position by the contact therewith of the plug 5l against which bears the end of the set screw 52.

In the operation of this device the diamond 50 is set at the proper point to describe tlie desired arc when the carrier is oscillated. The carrier is then fed into position to engage the diamond with the cutting surface to be dressed by means of the feed screw 25. When in position the carrier is Voscillated by means of the lever 48 to move the diamond across the wheel to be dressed.

1n order to set the diamond at the desired radius, a gage 53 is used. This gage comprises a substantially cylindrical meinber having a conical head 54 at one end and an enlarged cylindrical intermediate por-` tion 55. In the other end is yieldingly mounted a plunger 56 having a conical head 57, the outward movement of the plunger being limited iii any suitable manner. The conical heads of the gage are inserted 'in the sockets 42and 47, bringing the portion 55 into position to be engaged by thefdiamond ,50. The pin 49 is then tapped to bring the diamond into contact with the portion 55, after which the pin is clamped in position and the gage removed.

What l claim is:

l. ln a device of the character described, a bracket, bearings in said bracket, one of which has an aperture therethrough and the other of which has a socket, a frame, bearings on said frame, a shank on one of said? bearings extending through said aperture,a socket in the other of said bearings, a ball seated in said socket, and a wheel-dressing tool carried by said frame.

2. 1n a device of the character described, i

a frame, a wheel-dressing tool carried by the frame, said frame having'opposed sockets, and a gage having a portion to be engaged by the dressing tool to properly position said tool and having heads to enter said" socketsone of said heads being reciprocable.

A gage for setting a dressing tool in its carrier comprising a cylindrical member having a conical head and an enlarged portion and a pin havingV a conical head" yieldably mounted in said cylindrical member. Y

4. In a device of the character described, a housing, a slide mounted in said housing,

a groove in said slide, a key carried by said housingand contacting with the surface of said groove, resilient means holding` said key in Contact with the surface ,of said groove, and means to reciprocate said slide.

5. In a device of the character described, a housing, a slide having a groove therein mounted in saidhousing, means to reciprocate said slide and friction means comprising a key carried by said housing and engaged with said groove, and resilient Vmeans to hold said key in contact with the surface of the groove. Y

6. ln a device of the character described,

a housing, a slide having a groove therein mounted in, said housing,means to recipro-LA cate said slide, and friction means comprising a recessed key carried by said housing and engaged with said groove, a set screw having a shank adapted to enter the recess in the key, and a resilient sleeve carried by said shank and contacting with said key.

7. In a device of the character described, a feed screw, a ratchet wheel carried by said feed screw, a plate having an aperture through which said feed'screwextends, a

collar on said plate surrounding said ratchet wheel,l said collar being Apartially cut away, a .lever rotatably mounted on saideollar,

and la ratchet carried by said lever and adapted to extend through said cut-out portion of the collar to engage the teeth of said ratchet Wheel,

8. In a device of the character described, a feed screw, aratchet Wheel carried by said feed screw, -a plate having an aperture through Which said feed screw extends, a collar on Said plate surrounding said ratchet wheel, said collar being partially cut away, a lever rotatably mounted on said collar, and a ratchet carried by said lever and adapted to extend through said cut-out portion of the collar to engage the teeth ot said ratchet Wheel, one end ot' said collar being shaped to present a cam surface Whereby the ratchet may be lifted into inoperative position.

9. In a device of t-he character described, a feed screw, a ratchet Wheel mounted on 20 said t'eed screw, a collar surrounding said Wheel, said collar being partially cut away, a lever rotatably mounted on the collar, a ratchet in said lever adapted to extend through said cut-out portion to engage said ratchet Wheel, a stop to limit the movement ot' said lever, and means whereby said collar may be circumferentially adjusted.

HUGH M. ROC'KWELL. 

